TY - JOUR
T1 - Age constraints on recycled crustal and supracrustal sources of Archaean metasedimentary sequences, Eastern Goldfields Province, Western Australia: evidence from SHRIMP zircon dating
AU - Krapez, B.
AU - Brown, S.J.A.
AU - Hand, J.
AU - Barley, Mark
AU - Cas, R.A.F.
PY - 2000
Y1 - 2000
N2 - SHRIMP U-Pb zircon dating of sedimentary, volcanic and subvolcanic-intrusive rocks from unconformity bounded sequences in the Eastern Goldfields province defines maximum depositional ages for those sequences, The Kambalda Sequence, which records a backarc basin, was deposited prior to 2700 Ma and from at least 2715 Ma. The Spargoville Sequence, which records an are-adjacent, volcano-bound basin, was deposited between 2700 and 2683 Ma. The Kalgoorlie Sequence, which records an intra-are rift basin, comprises two tectonic stages with depositional ages of 2681-2670 and 2661 -2655 Ma. Deposition of the Spargoville and Kalgoorlie Sequences overlapped with the intrusion of granitoids, and subvolcanic porphyries, thereby indicating that those granitoids were emplaced during crustal extension. Younger, submarine-fan (Kurrawang Sequence) and braided-fluvial ( Merougil and Jones Creek Sequences) deposits of a remnant-ocean basin were deposited at
AB - SHRIMP U-Pb zircon dating of sedimentary, volcanic and subvolcanic-intrusive rocks from unconformity bounded sequences in the Eastern Goldfields province defines maximum depositional ages for those sequences, The Kambalda Sequence, which records a backarc basin, was deposited prior to 2700 Ma and from at least 2715 Ma. The Spargoville Sequence, which records an are-adjacent, volcano-bound basin, was deposited between 2700 and 2683 Ma. The Kalgoorlie Sequence, which records an intra-are rift basin, comprises two tectonic stages with depositional ages of 2681-2670 and 2661 -2655 Ma. Deposition of the Spargoville and Kalgoorlie Sequences overlapped with the intrusion of granitoids, and subvolcanic porphyries, thereby indicating that those granitoids were emplaced during crustal extension. Younger, submarine-fan (Kurrawang Sequence) and braided-fluvial ( Merougil and Jones Creek Sequences) deposits of a remnant-ocean basin were deposited at
U2 - 10.1016/S0040-1951(00)00059-7
DO - 10.1016/S0040-1951(00)00059-7
M3 - Article
SN - 0040-1951
VL - 322
SP - 89
EP - 133
JO - Tectonophysics
JF - Tectonophysics
ER -